An aerial view of the new Kishacoquillas Creek bridge

Kishacoquillas Creek Bridge Replacement

Lewistown, PA

Pennsylvania Department of Transportation

The concrete closed spandrel arch bridge carrying SR 3001-A01, also known as South Main Street, over Kishacoquillas Creek in the Borough of Lewistown was built in 1921, and ongoing deterioration resulted in a structural condition assessment of “poor.”

PennDOT District 2-0 partnered with KCI to design a replacement bridge. As prime consultant, the firm led the engineering and utility coordination efforts, and managed and provided QA/QC of subconsultant tasks and deliverables.

Verizon’s telecommunications fiber optic line in the area was a critical link in their network that serviced a multi-county region in central Pennsylvania, leading to KCI coordinating with Verizon for months to realign stormwater pipes and other underground utilities to provide space to install a vault for relocation. Daily survey results indicated wingwall movement beyond tolerable limits shortly after construction commenced. A rock buttress in front of the existing wall, extending down to the temporary causeway in the creek, was designed and constructed to provide stabilization in addition to a relocated pipe alignment that would outlet stormwater to the creek. After acquiring the commercial property in the northeast quadrant, our team significantly reduced the size and cost of the abutments and wingwalls and simplified construction by allowing the contractor to place cranes in the approach roadways instead of on rock platforms in the creek. The new concrete span structure is now serving the community with an expected service life of 100 years.